Investigation of a new InGaP-InGaAs pseudomorphic double doped-channel heterostructure field-effect transistor (PDDCHFET)

An interesting new InGaP-InGaAs pseudomorphic double doped-channel heterostructure field-effect transistor (PDDCHFET) is fabricated and demonstrated. Due to the employed InGaAs double doped channel (DDC) structure and Schottky behaviors of InGaP "insulator," good dc properties including higher turn-on voltage, lower leakage current, better linearity, and good RF performances are obtained. In addition, the experimental results are fitted well with theoretical simulation data based on a two-dimensional (2-D) simulator. Moreover, the studied device exhibits relatively negligible temperature-dependent characteristics over a wide operating temperature region (300